e backlight - fix updae fetching at end of balckight fade anim
e backlight - fix updae fetching at end of balckight fade anim

this helps keep the bl gadget in sync with actual backlight

FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,tasn/enlightenment,tasn/enlightenment,rvandegrift/e